MSA Automatic engine start/stop function

Automatic engine start/stop function

The MSA ensures automated shutdown of the engine while the vehicle is being driven if the vehicle comes to a standstill and a number of essential vehicle conditions are met to enable this shutdown. There are approximately twenty of these vehicle conditions (so-called shutdown inhibitors), for example:
· Clutch not pressed.
· Brake partial vacuum adequate.
· Battery charge status adequately high.
Just as automatic as thus shutdown is the automatic new start of the engine as soon as the clutch is operated again.
Sample scenario: switching off the engine at a standstill at a red traffic light or in stop-and-go traffic.
1 Vehicle moving
2 Gear is engaged.
The accelerator pedal is pressed.
3 The engine is running.
The time and temperature are displayed in the instrument cluster.
4 The driver brakes until the vehicle comes to a standstill.
5 The driver engages neutral and releases the clutch pedal.
6 The engine shuts down.
The symbol (Start/Stop) appears in the instrument cluster.
7 The driver wants to continue the journey.
8 The driver presses the clutch pedal.
The engine starts.
9 The gear can be engaged and the journey continued.
The symbol (Start/Stop) goes out.

The fully automatic switch-on of the engine on MSA vehicles can also occur when the driver performs no action at all. Customer annoyance and customer complaints are not based on a malfunction - this is planned.
Situations in which the engine starts fully automatically without any action on the part of the driver are for example:
· Battery almost fully discharged: flat batteries can lead to a complete breakdown of the vehicle. To prevent this, the engine is started.
· Insufficient brake partial vacuum: insufficient brake partial vacuum can lead to safety risks during braking maneuvers. To prevent this, the engine is started.
· Vehicle at a standstill on an incline starts to roll: when the vehicle is switched off, many systems are inactive. Rolling vehicles without the supporting effect of the vehicle systems are a safety risk. To prevent this, the engine is started.
 

is one of the best Professional scan tools to for BMW; Autohex allows you to diagnose, code, program/flash ecus, and add new keys for BMW. For more information: BMW Scan Tool